.login-container {
    height: calc(100% - 50px);
    display: flex;
    /* 水平居中 */
    justify-content: center;
    /* 垂直居中 */
    align-items: center;
}

.login-dialog {
    width: 400px;
    height: 350px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
}

.login-dialog h3 {
    padding: 50px 0;
    /* 文字的水平居中 */
    text-align: center;
}

.login-dialog .row {
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-dialog .row span {
    width: 100px;
    font-weight: 700;
}

#username, #password {
    width: 200px;
    height: 40px;
    font-size: 24px;
    border: none;
    outline: none;
    padding-left: 5px;
    border-radius: 10px;
}

#submit {
    width: 300px;
    height: 40px;
    color: white;
    background-color: rgb(0, 128, 0);
    border: none;
    border-radius: 10px;
}

#submit:active {
    background-color: grey;
}